Chapter 1

Subtract 382 from 541 .

For the following problems, perform the additions and round to the nearest hundred. $$ \begin{array}{r} 9,573 \\ 101,279 \\ 122,581 \\ \hline \end{array} $$

Subtract 1,841 from 5,246 .

For the next five problems, replace the letter \(m\) with the whole number that will make the addition true. $$ \begin{array}{r} 62 \\ +\quad m \\ \hline 67 \end{array} $$

Subtract 26,082 from 35,040 .

For the next five problems, replace the letter \(m\) with the whole number that will make the addition true. $$ \begin{array}{r} 106 \\ +\quad m \\ \hline 113 \end{array} $$

Find the difference between 47 and 21 .

For the next five problems, replace the letter \(m\) with the whole number that will make the addition true. $$ \begin{array}{r} 432 \\ +\quad m \\ \hline 451 \end{array} $$

Find the difference between 1,005 and 314 .

For the next five problems, replace the letter \(m\) with the whole number that will make the addition true. $$ \begin{array}{r} 803 \\ +\quad m \\ \hline 830 \end{array} $$

Find the difference between 72,085 and 16 .

For the next five problems, replace the letter \(m\) with the whole number that will make the addition true. $$ \begin{array}{r} 1,893 \\ +\quad m \\ \hline 1,981 \end{array} $$

Find the difference between 7,214 and 2,049 .

The number of nursing and related care facilities in the United States in 1971 was \(22,004 .\) In 1978 , the number was 18,722 . What was the total number of facilities for both 1971 and \(1978 ?\)

Find the difference between 56,108 and 52,911 .

The number of persons on food stamps in \(1975,1979,\) and 1980 was \(19,179,000,19,309,000,\) and 22,023,000 , respectively. What was the total number of people on food stamps for the years 1975 , \(1979,\) and \(1980 ?\)

How much bigger is 92 than \(47 ?\)

The enrollment in public and nonpublic schools in the years \(1965,1970,1975,\) and 1984 was \(54,394,000,59,899,000,61,063,000,\) and \(55,122,000,\) respectively. What was the total enrollment for those years?

How much bigger is 114 than \(85 ?\)

The area of New England is 3,618,770 square miles. The area of the Mountain states is 863,563 square miles. The area of the South Atlantic is 278,926 square miles. The area of the Pacific states is 921,392 squ are miles. What is the total area of these regions?

How much bigger is 3,006 than \(1,918 ?\)

In \(1960,\) the IRS received 1,188,000 corpor ate income tax returns. In 1965,1,490,000 returns were received. In 1970,1,747,000 returns were received. In \(1972-1977,1,890,000 ; 1,981,000 ; 2,043,000 ;\) 2,100,\(000 ; 2,159,000 ;\) and 2,329,000 returns were received, respectively. What was the total number of corpor ate tax returns received by the IRS during the years \(1960,1965,1970,1972-1977 ?\)

How much bigger is 11,201 than \(816 ?\)

How much bigger is 3,080,020 than \(1,814,161 ?\)

In Wichita, Kansas, the sun shines about \(74 \%\) of the time in July and about \(59 \%\) of the time in November. How much more of the time (in percent) does the sun shine in July than in November?

The lowest temperature on record in Concord, New Hampshire in May is \(21^{\circ} \mathrm{F}\), and in July it is \(35^{\circ} \mathrm{F}\). What is the difference in these lowest temperatures?

In 1980 , there were 83,000 people arrested for prostitution and commercialized vice and 11,330,000 people arrested for driving while intoxicated. How many more people were arrested for drunk driving than for prostitution?

For the following problems, try to add the numbers mentally. $$ \begin{array}{r} 5 \\ 5 \\ 3 \\ 7 \\ \hline \end{array} $$

In 1980 , a person with a bachelor's degree in accounting received a monthly salary offer of $$\$ 1,293$$, and a person with a marketing degree a monthly salary offer of $$\$ 1,145 .$$ How much more was offered to the person with an accounting degree than the person with a marketing degree?

For the following problems, try to add the numbers mentally. $$ \begin{array}{r} 8 \\ 2 \\ 6 \\ 4 \end{array} $$

In 1970 , there were about 793 people per square mile living in Puerto Rico, and 357 people per square mile living in Guam. How many more people per square mile were there in Puerto Rico than Guam?

For the following problems, try to add the numbers mentally. $$ \begin{array}{r} 9 \\ 1 \\ 8 \\ 5 \\ 2 \end{array} $$

The 1980 population of Singapore was 2,414,000 and the 1980 population of Sri Lanka was 14,850,000 . How many more people lived in Sri Lanka than in Singapore in \(1980 ?\)

For the following problems, try to add the numbers mentally. $$ \begin{aligned} &\begin{array}{r} 6 \\ 4 \\ 3 \\ 1 \end{array}\\\ &\begin{array}{l} 7 \\ 9 \\ 4 \end{array} \end{aligned} $$

In 1978 , there were 3,095,000 telephones in use in Poland and 4,292,000 in Switzerland. How many more telephones were in use in Switzerland than in Poland in \(1978 ?\)

For the following problems, try to add the numbers mentally. $$ \begin{array}{r} 20 \\ 30 \end{array} $$

For the following problems, try to add the numbers mentally. $$ \begin{array}{r} 15 \\ 35 \\ \hline \end{array} $$

For the following problems, try to add the numbers mentally. $$ \begin{array}{r} 16 \\ 14 \\ \hline \end{array} $$

For the following problems, try to add the numbers mentally. $$ \begin{array}{r} 23 \\ 27 \end{array} $$

For the following problems, try to add the numbers mentally. $$ \begin{array}{r} 82 \\ 18 \\ \hline \end{array} $$

For the following problems, try to add the numbers mentally. $$ \begin{array}{l} 36 \\ 14 \end{array} $$

For the following problems, replace the [U+2610] with the whole number that will make the subtraction true. $$ \begin{array}{r} 14 \\ -\square \\ \hline 3 \end{array} $$

In the number 610,467 , how many thousands are there?

For the following problems, replace the [U+2610] with the whole number that will make the subtraction true. $$ \begin{array}{r} 21 \\ -\square \\ \hline 14 \end{array} $$

Write 8,840 as you would read it.

For the following problems, replace the [U+2610] with the whole number that will make the subtraction true. $$ \begin{array}{l} 35 \\ -\square \\ \hline 25 \end{array} $$

Round 6,842 to the nearest hundred.

For the following problems, replace the [U+2610] with the whole number that will make the subtraction true. $$ \begin{array}{r} 16 \\ -\square \\ \hline 9 \end{array} $$

Round 431,046 to the nearest million.

For the following problems, replace the [U+2610] with the whole number that will make the subtraction true. $$ \begin{array}{r} 28 \\ -\square \\ \hline 16 \end{array} $$